Oxidation of Soot over Bimetallic Noble Catalysts in the Presence of O₂ in Fluidized Bed Reactor

抄録

Oxidation of soot over a series of bi-noble metals Ru-X (X=Rh, Pd, Ag, Ir, Pt and Au) supported on SiO₂ has been conducted in fluidized bed reactor with temperature programmed reaction (TPR) technique. The effects of molar ratio and combination of Ru and X on the Ru-X/SiO₂ activity in the soot oxidation have been investigated. The Ru_1-y-Pd_y/SiO₂ (0.1 ≤ y ≤ 0.9) exhibited the high catalytic activity and selectivity to CO₂ when the molar ratio is 1:1 (y=0.5). Among Ru-X/SiO₂ (X=Rh, Pd, Ag, Ir, Pt and Au), Ru-Pd/SiO₂ shows high activity for the soot oxidation in fluidized bed reactor. Compared to soot oxidation in fixed bed reactor, the oxidation of soot was accomplished at low temperature and this can be attributed to the promotion of mass transfer in fluidized bed reactor. [DOI: 10.1380/ejssnt.2011.142]